Prince Harry and Meghan Markle are set to say “I do” on Saturday, May 19, at Windsor Castle. Yahoo will cover the historic event live from London from 10 a.m. to 3 p.m. BST (5 a.m. to 10 a.m. ET), giving viewers an inside look at everything from the guest arrivals at St. George’s Chapel and the big reveal of Markle’s wedding dress to the newlyweds’ celebratory carriage procession and their journey to the reception at Frogmore House.

Celebrity host Kate Thornton will lead Yahoo’s live show of the royal wedding. She’ll be joined by guests — including Googlebox star Rev. Kate Bottley, royal commentator Richard Fitzwilliams, stylist Grace Woodward, and social media guru Christian Howes — who’ll share their wedding predictions and help analyze every moment as it happens.

Be sure to get involved in the conversation using the hashtag #RoyalBox